344 lines
8.4 KiB
C
344 lines
8.4 KiB
C
/*
|
|
* Copyright (c) 1992, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software donated to Berkeley by
|
|
* Jan-Simon Pendry.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)portal_vfsops.c 8.6 (Berkeley) 1/21/94
|
|
*
|
|
* $Id: portal_vfsops.c,v 1.9 1995/11/16 11:24:06 bde Exp $
|
|
*/
|
|
|
|
/*
|
|
* Portal Filesystem
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/time.h>
|
|
#include <sys/types.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/filedesc.h>
|
|
#include <sys/file.h>
|
|
#include <sys/vnode.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/namei.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/mbuf.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/socketvar.h>
|
|
#include <sys/protosw.h>
|
|
#include <sys/domain.h>
|
|
#include <sys/un.h>
|
|
#include <miscfs/portal/portal.h>
|
|
|
|
static int portal_init __P((void));
|
|
static int portal_mount __P((struct mount *mp, char *path, caddr_t data,
|
|
struct nameidata *ndp, struct proc *p));
|
|
static int portal_start __P((struct mount *mp, int flags, struct proc *p));
|
|
static int portal_unmount __P((struct mount *mp, int mntflags,
|
|
struct proc *p));
|
|
static int portal_root __P((struct mount *mp, struct vnode **vpp));
|
|
static int portal_quotactl __P((struct mount *mp, int cmd, uid_t uid,
|
|
caddr_t arg, struct proc *p));
|
|
static int portal_statfs __P((struct mount *mp, struct statfs *sbp,
|
|
struct proc *p));
|
|
static int portal_sync __P((struct mount *mp, int waitfor,
|
|
struct ucred *cred, struct proc *p));
|
|
static int portal_vget __P((struct mount *mp, ino_t ino,
|
|
struct vnode **vpp));
|
|
static int portal_fhtovp __P((struct mount *mp, struct fid *fhp,
|
|
struct mbuf *nam, struct vnode **vpp,
|
|
int *exflagsp, struct ucred **credanonp));
|
|
static int portal_vptofh __P((struct vnode *vp, struct fid *fhp));
|
|
|
|
static int
|
|
portal_init()
|
|
{
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Mount the per-process file descriptors (/dev/fd)
|
|
*/
|
|
static int
|
|
portal_mount(mp, path, data, ndp, p)
|
|
struct mount *mp;
|
|
char *path;
|
|
caddr_t data;
|
|
struct nameidata *ndp;
|
|
struct proc *p;
|
|
{
|
|
struct file *fp;
|
|
struct portal_args args;
|
|
struct portalmount *fmp;
|
|
struct socket *so;
|
|
struct vnode *rvp;
|
|
u_int size;
|
|
int error;
|
|
|
|
/*
|
|
* Update is a no-op
|
|
*/
|
|
if (mp->mnt_flag & MNT_UPDATE)
|
|
return (EOPNOTSUPP);
|
|
|
|
error = copyin(data, (caddr_t) &args, sizeof(struct portal_args));
|
|
if (error)
|
|
return (error);
|
|
|
|
error = getsock(p->p_fd, args.pa_socket, &fp);
|
|
if (error)
|
|
return (error);
|
|
so = (struct socket *) fp->f_data;
|
|
if (so->so_proto->pr_domain->dom_family != AF_UNIX)
|
|
return (ESOCKTNOSUPPORT);
|
|
|
|
error = getnewvnode(VT_PORTAL, mp, portal_vnodeop_p, &rvp); /* XXX */
|
|
if (error)
|
|
return (error);
|
|
MALLOC(rvp->v_data, void *, sizeof(struct portalnode),
|
|
M_TEMP, M_WAITOK);
|
|
|
|
fmp = (struct portalmount *) malloc(sizeof(struct portalmount),
|
|
M_UFSMNT, M_WAITOK); /* XXX */
|
|
rvp->v_type = VDIR;
|
|
rvp->v_flag |= VROOT;
|
|
VTOPORTAL(rvp)->pt_arg = 0;
|
|
VTOPORTAL(rvp)->pt_size = 0;
|
|
VTOPORTAL(rvp)->pt_fileid = PORTAL_ROOTFILEID;
|
|
fmp->pm_root = rvp;
|
|
fmp->pm_server = fp; fp->f_count++;
|
|
|
|
mp->mnt_flag |= MNT_LOCAL;
|
|
mp->mnt_data = (qaddr_t) fmp;
|
|
getnewfsid(mp, MOUNT_PORTAL);
|
|
|
|
(void)copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
|
|
bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
|
|
(void)copyinstr(args.pa_config,
|
|
mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size);
|
|
bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
|
|
|
|
#ifdef notdef
|
|
bzero(mp->mnt_stat.f_mntfromname, MNAMELEN);
|
|
bcopy("portal", mp->mnt_stat.f_mntfromname, sizeof("portal"));
|
|
#endif
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
portal_start(mp, flags, p)
|
|
struct mount *mp;
|
|
int flags;
|
|
struct proc *p;
|
|
{
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
portal_unmount(mp, mntflags, p)
|
|
struct mount *mp;
|
|
int mntflags;
|
|
struct proc *p;
|
|
{
|
|
struct vnode *rootvp = VFSTOPORTAL(mp)->pm_root;
|
|
int error, flags = 0;
|
|
|
|
|
|
if (mntflags & MNT_FORCE) {
|
|
/* portal can never be rootfs so don't check for it */
|
|
if (!doforce)
|
|
return (EINVAL);
|
|
flags |= FORCECLOSE;
|
|
}
|
|
|
|
/*
|
|
* Clear out buffer cache. I don't think we
|
|
* ever get anything cached at this level at the
|
|
* moment, but who knows...
|
|
*/
|
|
#ifdef notyet
|
|
mntflushbuf(mp, 0);
|
|
if (mntinvalbuf(mp, 1))
|
|
return (EBUSY);
|
|
#endif
|
|
if (rootvp->v_usecount > 1)
|
|
return (EBUSY);
|
|
error = vflush(mp, rootvp, flags);
|
|
if (error)
|
|
return (error);
|
|
|
|
/*
|
|
* Release reference on underlying root vnode
|
|
*/
|
|
vrele(rootvp);
|
|
/*
|
|
* And blow it away for future re-use
|
|
*/
|
|
vgone(rootvp);
|
|
/*
|
|
* Shutdown the socket. This will cause the select in the
|
|
* daemon to wake up, and then the accept will get ECONNABORTED
|
|
* which it interprets as a request to go and bury itself.
|
|
*/
|
|
soshutdown((struct socket *) VFSTOPORTAL(mp)->pm_server->f_data, 2);
|
|
/*
|
|
* Discard reference to underlying file. Must call closef because
|
|
* this may be the last reference.
|
|
*/
|
|
closef(VFSTOPORTAL(mp)->pm_server, (struct proc *) 0);
|
|
/*
|
|
* Finally, throw away the portalmount structure
|
|
*/
|
|
free(mp->mnt_data, M_UFSMNT); /* XXX */
|
|
mp->mnt_data = 0;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
portal_root(mp, vpp)
|
|
struct mount *mp;
|
|
struct vnode **vpp;
|
|
{
|
|
struct vnode *vp;
|
|
|
|
|
|
/*
|
|
* Return locked reference to root.
|
|
*/
|
|
vp = VFSTOPORTAL(mp)->pm_root;
|
|
VREF(vp);
|
|
VOP_LOCK(vp);
|
|
*vpp = vp;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
portal_quotactl(mp, cmd, uid, arg, p)
|
|
struct mount *mp;
|
|
int cmd;
|
|
uid_t uid;
|
|
caddr_t arg;
|
|
struct proc *p;
|
|
{
|
|
|
|
return (EOPNOTSUPP);
|
|
}
|
|
|
|
static int
|
|
portal_statfs(mp, sbp, p)
|
|
struct mount *mp;
|
|
struct statfs *sbp;
|
|
struct proc *p;
|
|
{
|
|
|
|
sbp->f_type = MOUNT_PORTAL;
|
|
sbp->f_flags = 0;
|
|
sbp->f_bsize = DEV_BSIZE;
|
|
sbp->f_iosize = DEV_BSIZE;
|
|
sbp->f_blocks = 2; /* 1K to keep df happy */
|
|
sbp->f_bfree = 0;
|
|
sbp->f_bavail = 0;
|
|
sbp->f_files = 1; /* Allow for "." */
|
|
sbp->f_ffree = 0; /* See comments above */
|
|
if (sbp != &mp->mnt_stat) {
|
|
bcopy(&mp->mnt_stat.f_fsid, &sbp->f_fsid, sizeof(sbp->f_fsid));
|
|
bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
|
|
bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
portal_sync(mp, waitfor, cred, p)
|
|
struct mount *mp;
|
|
int waitfor;
|
|
struct ucred *cred;
|
|
struct proc *p;
|
|
{
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
portal_vget(mp, ino, vpp)
|
|
struct mount *mp;
|
|
ino_t ino;
|
|
struct vnode **vpp;
|
|
{
|
|
|
|
return (EOPNOTSUPP);
|
|
}
|
|
|
|
static int
|
|
portal_fhtovp(mp, fhp, nam, vpp, exflagsp, credanonp)
|
|
struct mount *mp;
|
|
struct fid *fhp;
|
|
struct mbuf *nam;
|
|
struct vnode **vpp;
|
|
int *exflagsp;
|
|
struct ucred **credanonp;
|
|
{
|
|
|
|
return (EOPNOTSUPP);
|
|
}
|
|
|
|
static int
|
|
portal_vptofh(vp, fhp)
|
|
struct vnode *vp;
|
|
struct fid *fhp;
|
|
{
|
|
|
|
return (EOPNOTSUPP);
|
|
}
|
|
|
|
static struct vfsops portal_vfsops = {
|
|
portal_mount,
|
|
portal_start,
|
|
portal_unmount,
|
|
portal_root,
|
|
portal_quotactl,
|
|
portal_statfs,
|
|
portal_sync,
|
|
portal_vget,
|
|
portal_fhtovp,
|
|
portal_vptofh,
|
|
portal_init,
|
|
};
|
|
|
|
VFS_SET(portal_vfsops, portal, MOUNT_PORTAL, VFCF_SYNTHETIC);
|